Suggested Articles
Search found 1 match
- Fri Sep 26, 2025 7:41 am
- Forum: Common Problems
- Topic: Installer fails when upgrading from v5.x to v6.x — “Product Code” already in use
- Replies: 1
- Views: 104
- Jump to post
Installer fails when upgrading from v5.x to v6.x — “Product Code” already in use
Hi all, I’m running into an issue where my Advanced Installer project installs cleanly when “Create new” but fails during upgrades. The error says the “Product Code” is already in use, even though I’ve bumped versions and GUIDs. I’m using MSI, not EXE wrapper. Has anyone else seen this during major ...